Auxiliary door-lock



1 2 "WIT IHI HUN w. A. SHIRLEY. AUXILIARY 000R LOCK. APPLICATION FILED SEPT. \3. 1919- Patented- Mar. 2, 1920.

n rmmms WILLIAM ARTHUR SHIRLEY, OFQEORT WORTH, TEXAS.

AUXILIARY DOOR-LOCK.

Specification of Letters Patent.

Patented Mar. 2, 1920.

Application filed September 13, 1919. Serial No. 323,528.

To all whom it may concern:

Be it known that 1, WILLIAM ARTHUR SHIRLEY, a citizen of-the United States, and a resident of Fort Worth, in the county of Tarrant and State of Texas, have invented certain new and useful Improvements in Auxiliary Door-Locks, of which the following is a specification.

My invention is an improvement in auxiliary door locks, and has for its object to provide a simple, inexpensive device of the character specified which may be used in connection with a door of any character for securely blocking the door against movement.

In the drawings:

Figure 1 is a perspective view of a por tion of a door showing the improvement in use;

Fig. 2 is a side view of the lock;

Fig. 3 is a front view.

In the present embodiment of the invention the improved lock comprises an angle bar consisting of a long arm'l and a short arm 2, the short arm extending at approximately a right angle to the long arm, but having that face thereof adjacent to the long arm slightly beveled, as shown at 3, so that it may be easily inserted beneath a door 4.

At the angle or at the connection between the arms 1 and 2 the angle bar is cut away on each side, as indicated at 5, and a plate 6 is pivoted to the angle bar at this point. This plate has lugs 7 which engage the cut away portions 5, and a pivot pin 8 is passed through registering openings in the lugs and in the angle bar to pivotally connect the plate to the angle bar.

It will be noticed that this plate extends from the angle bar in the opposite direction to the arm 2. The outer end ofthe plate 6 is longitudinally notched or recessed as indicated at 9, and a turnbuckle arrangement connects the outer end of the plate and the end of the arm 1 of the angle bar remote from the arm 2. This turnbuckle consists of two threaded rods 10 and 11, one of which, 10, is rigid with the arm 1 of the angle bar, and the other, 11, is pivoted to the plate 6. The adjacent ends of the rods 10 and 11 are threaded in opposite directions and are engaged by an internally threaded sleeve or nut 12, the said sleeve or nut having radial openings, as shown, for the engagement of a tool to turn the same.

In use, the device is arranged as shown in Figs. 1 and 2, the bar 2 of the angle bar be ing inserted beneath the door after the door is closed, the arm 1 of the angle bar being pressed up close against the door, after which the nut 12 is turned to force the plate 6 tightly into contact with the floor. It will be evident that a very great pressure be brought upon the plate 6, to cause it to grip the floor so firmly that it will be impossible to open the door. Since the pressure exerted against the door in opening the same is generally at the knob, it will be obvious that the greater the pressure the more tightly the device will be wedged between the door and the floor.

The improvement may be applied to any door and as it is small and compact it may be carried by travelers to be used whenever desired.

I claim:

A device of the character specified comprising an angle bar consisting of a relatively long and a relatively short arm extending at approximately a right angle with respect to each other, the short arm having that face adjacent to the long arm inclined to be easily received beneath the door, a plate pivoted to the bar at the junction of the arms and mounted to swing toward either arm and having its lower face flush with the outer face of the short arm, said plate having a relatively large engaging surface to engage the floor, and a sectional brace arranged between the outer end of the plate and the long arm and having a turnbuckle between the sections for lengthening and shortening the brace, one section of the brace being rigid with the relatively long arm and the other section being pivoted to the plate.

WILLIAM ARTHUR SHIRLEY. 

